Home / Standards / GB 1297-93 GB 1297-93 Chemical reagent — Anhydrous L-cysteine hydrochloride 化学试剂 无水L-半胱氨酸盐酸盐 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A